Information

Product Overview
© 2009 Microchip Technology Inc. DS51842A-page 7
The MCP2120/22 Developer’s Board, as shown in Figure 1-1, has the following
hardware features:
1. Mini USB connector (for powering the board).
2. Onboard +3.3V regulator for powering PIC18F65J50.
3. Hooks for an external regulated DC supply.
4. Jumper to issolate PIC18F65J50 power signal from the rest of board power. This
allows the board to operate at voltages higher than 3.3V.
5. DB-9 connector and associated hardware for direct connection to MCP2120 or
MCP2122 UART (DB-9 interface requires RS-232 signal levels).
6. Twelve-pin header connection to Host UART interface.
7. Four jumpers (3-pin) to select source of UART signals. Either DB-9 connector or
the PIC18F65J50.
8. External Clock (from PIC18F65J50’s ECCP1 pin) Jumper.
9. Green power-on indicator LED.
10. Implemented IR transceiver circuit (two optional optical transceiver circuits
implemented but not populated).
11. Reset switch for PIC18F65J50 device.
12. ICSP Header for PIC18F65J50.
13. Jumper option for PIC18F65J50 program selection (not installed).
14. PIC18F65J50 crystal.
15. MCP2120 crystal socket .
16. Jumper to select source of MCP2120/22 Reset signal.
17. Jumper to select source of MCP2120 MODE signal.
18. MCP2120/22 SOIC and DIP Footprints (DIP package is the default installation).
Note: A schematic of the MCP2120/22 Developer’s Board is shown in
Section A.2 “Board - Schematic”